STM32 DAC Monotonicity vs DNL

I was planning on using an STM32F103RE in a design where the DACs would be part of a control loop, and will need to be used in 12 bit mode.  Unfortunately the DAC specifications in the datasheet show extremely bad DNL performance of +-2LSBs in 12 bit mode which, if correct, means the DAC can not be monotonic and is useless for my application.  However, the datasheet also states the DAC is monotonic.  Which is correct?  I have checked the errata but not yet found anything to clarify this.